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extrusion speed

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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004006
EISBN: 978-1-62708-185-6
... or indirect extrusion. The article illustrates the significance of extrusion speeds and temperatures in hot extrusion. It describes the basic types of presses used in the hot extrusion of metals. The article provides information on the characterization of extruded shapes and explains the operating parameters...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006534
EISBN: 978-1-62708-207-5
... extrusion speed and exit temperature, and their effect on product quality. The article also provides information on extrusion presses, press dies, and tooling, and addresses quality issues such as surface defects, blistering, and internal cracking. It concludes with a discussion on the drawing of solid...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006385
EISBN: 978-1-62708-192-4
.... Extrusion presents an extremely demanding application of tribology. Elevated temperatures, high processing speeds, demanding surface finish and reliability requirements, and environmental considerations all play a role in determining tooling life and product quality. In the common direct extrusion...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004015
EISBN: 978-1-62708-185-6
... Although the term extrudability (i.e., the material formability under conditions of the extrusion process) does not have a precise physical definition (see the section “Extrudability” in this article), the relative extrudability of aluminum alloys can be roughly ranked as measured by extrusion exit speed...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009006
EISBN: 978-1-62708-185-6
.... The extrusion temperature will often be specified so as to be below temperature ranges associated with poor ductility or “hot shortness.” Unfortunately, surface frictional heating, intensified by excessive ram speed, may raise the surface temperature into the hot-shortness range anyhow, leading to surface...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004016
EISBN: 978-1-62708-185-6
..., the slip-line theory gives a full analysis of the problem. A detailed slip-line analysis of ECAE was performed in Ref 11 . A few characteristic cases are shown in Fig. 5 , 6 , 7 , 8 , together with designation of specific plastic areas where V is extrusion speed, h is billet thickness, τ...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004032
EISBN: 978-1-62708-185-6
... in.), the variation decreasing with increasing extrusion speed ( Ref 73 ). It was found that in the extrusion of mild and stainless steel billets of 221 mm (8.7 in.) length, the film thickness was 100 to 125 μm (0.004 to 0.005 in.) at the front end, decreasing to 25 to 50 μm (0.001 to 0.002 in.) at the back end...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006085
EISBN: 978-1-62708-175-7
... It is clear from Fig. 6 that K decreases with temperature, and it follows that hot extrusion requires lower extrusion pressure than cold extrusion. The effect of temperature on K is similar to the relationship between flow stress and temperature. For cast billets, K increases as the ram speed...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006488
EISBN: 978-1-62708-207-5
... metalworking techniques, such as extrusion and forging. Wrought aluminum MMCs typically contain less than 40 vol% reinforcement. These composites are manufactured by preparing a billet or an ingot, which is subsequently forged, rolled, or extruded. The billet can be produced using casting, spray forming...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005893
EISBN: 978-1-62708-167-2
... heating mathematical models metals optimal control method THE MAIN PURPOSE of induction heating installations (IHIs) in production lines for hot working of metals is to provide the required workpiece temperature prior to subsequent process stages (e.g., hot forming, forging, rolling, extrusion...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004013
EISBN: 978-1-62708-185-6
...  Land length Surface condition Extrusion parameters Extrusion ratio Extrusion temperature Extrusion speed Lubrication Cooling Process Chamber extrusion Drawing Hydrostatic extrusion Source: Ref 16 Fig. 6 Types of failure observed during coextrusion...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003015
EISBN: 978-1-62708-200-6
... extrudates leave the extrusion die as a highly viscous melt that must be pulled away from the die. Because some stretching usually occurs, the opening in the extrusion die is from 5 to 30% oversized to accommodate the drawdown. The speed of the extrusion through the cooling device is controlled by pull rolls...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001110
EISBN: 978-1-62708-162-7
.... The temperature dependence of the NbTi alloy again comes into play when one considers the speed of extrusion. As the extrusion proceeds, friction between the billet and the liner heats the billet. To facilitate a smooth extrusion, the billet and the extrusion tooling are coated with MoS 2 or graphite to reduce...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004005
EISBN: 978-1-62708-185-6
... deformation, and limited shape complexity. Extrusion Pressure The punch pressure in extrusion depends on the flow stress of the material being extruded, the degree of deformation (strain), billet geometry, billet/die interface friction, and die design. Punch speed available in conventional presses has...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006417
EISBN: 978-1-62708-192-4
...Abstract Abstract Tool steels are carbon, alloy, and high-speed steels that can be hardened and tempered to high hardness and strength values. This article discusses the classifications of commonly used tool steels: water-hardening tool steels, shock-resisting tool steels, cold-work tool steels...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006580
EISBN: 978-1-62708-290-7
... of materials that can be extruded at various levels of accuracy and speed. As the names imply, hot extrusion uses thermal energy to soften the material so that it can extruded. As the material softens, its viscosity decreases, enabling it to be pushed through the die at a given level of accuracy and speed...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006526
EISBN: 978-1-62708-207-5
... of the workpiece. Because of their high speeds, mechanical crank presses are generally preferred for producing parts requiring a force up to about 11 MN (1200 tonf). Production of as many as 70 extrusions/min is not unusual, and higher production rates are often obtained. Therefore, auxiliary press equipment...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004004
EISBN: 978-1-62708-185-6
... other processes, such as extrusion, coining, trimming, hole punching, and thread rolling. Cold-heading is typically a high-speed process where the blank is progressively moved through a multi-station machine. The process is widely used to produce a variety of small- and medium-sized hardware items...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003429
EISBN: 978-1-62708-195-5
... tendencies when used as matrix alloys for composites. Precise billet preheat temperature control and low speed control of the extrusion are necessary to avoid overheating of the composite during the extrusion. Presses designed for “hard-alloy” extrusions are needed for the composites. Dies and Shapes...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
...Abstract Abstract Forging machines use a wide variety of hammers, presses, and dies to produce products with the desired shape, size, and geometry. This article discusses the major types of hammers (gravity-drop, power-drop, high speed, and open-die forging), and presses (mechanical, hydraulic...